半导体发电在冰箱余热回收的实验探索研究

doi:10.19784/j.cnki.issn1672-0172.2024.03.010

摘要/Abstract

摘要： 为了进一步研究制冷系统节能增效,调研了近年来冰箱制冷系统余热回收利用研究的进展,综合分析了冰箱余热回收利用的不同余热回收方式的经济性及可行性。具体研究了利用半导体温差发电技术进行余热发电的可行性,通过系统设计、理论计算及实验验证发现,利用半导体余热发电来进行余热回收。实验结果表明,可以在强制连续运行（PD）工况下实现目标最大发电量1.51 W;并可以降低冷凝器出口温度至45 ℃以内,PD模式下降低36 ℃~39 ℃,能耗模式下降低18 ℃~19 ℃,提升系统过冷度;但由于样机改造,增加了一定的热负荷,整机能效还是有所上升,PD模式下功率增加5.6%~17%,能耗模式下功率增加13%~19%。半导体温差发电技术作为一个具有较大潜力的余热回收技术,通过实验方式探索性研究了该技术耦合冰箱制冷系统的可行性,随着温差发电材料及相关技术的快速发展,需要持续研究系统设计匹配,换热器-发电模块传热优化,电量储存与转换等工作,对冰箱或其他制冷系统余热回收实现节能增效具有重要的参考意义。

关键词: 余热回收, 制冷系统, 低品位余热, 半导体温差发电

Abstract: In order to further study the energy saving and efficiency improvement of refrigeration systems, the progress of research on waste heat recovery in refrigerator refrigeration systems in recent years was investigated. The economic feasibility and feasibility of different waste heat recovery methods for refrigerator waste heat recovery were comprehensively analyzed. The feasibility of using semiconductor thermoelectric power generation (TEG) technology for waste heat power generation was specifically studied. Through system design, theoretical calculation, and experimental verification, it was found that waste heat recovery can be achieved by using semiconductor waste heat power generation. The experimental results showed that the target maximum power generation of 1.51 W can be achieved under the Pull Down (PD) condition; and the outlet temperature of the condenser can be effectively reduced to within 45 ℃, with a decrease of 36 ℃~39 ℃ under the PD mode and a decrease of 18 ℃~19 ℃ under the energy consumption mode, which improves the system subcooling degree. However, due to the modification of the prototype, there is an increase in thermal load, resulting in an overall improvement in energy efficiency. Under PD mode, the power increased by 5.6%~17%, and under energy consumption mode, the power increased by 13%~19%. TEG technology, as a waste heat recovery technology with great potential, was explored through experimental research on its feasibility coupled with refrigerator refrigeration systems. With the rapid development of thermoelectric power generation materials and related technologies, continuous research is needed on system design matching, heat exchanger-power generation module heat transfer optimization, and electricity storage and conversion, which has important reference significance for achieving energy-saving and efficiency-improvement of waste heat recovery in refrigerators or other refrigeration systems.

Key words: Waste heat recovery, Refrigerant system, Low-grade waste heat, Thermoelectric power generation

中图分类号:

王栋, 韩延龙. 半导体发电在冰箱余热回收的实验探索研究[J]. 家电科技, 2024, 0(3): 62-69.

WANG Dong, HAN Yanlong. Exploration experimental study of waste heat recovery by TEG in refrigerators[J]. Journal of Appliance Science & Technology, 2024, 0(3): 62-69.

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